Calendering machine



EAAWJQB EHOUSE. V MACHINE. I 1921 J H. WHIT CALENDERING F1 LED JULY 1 BW M ATTORNEYS in ii JEREll/IIA T 'WHITEI-IO'UE-E, Z3 SPBEllG-FIELD, MASSACHUSETTS.

GALENIDERIN IilLfihGrifllil'E.

Application filed July 11,

To ([17, 107mm it may concern:

Be it known that l JEREJHAH ll lVHrrnarouse, citiyen of the United States, residing at. Springfield, in the county of Hampden and State of Massachusetts have invented new and useful Improvements in Calendering Twila-chines of which the following is a specification.

This invention relates to calendering-ma- 10 chines. and more particularly to so-called "super-calenders such. as are used in the manufacture of glazed paper.

In machines of the above-named general character, the web of paper to be operated upon is unwound from a supply roll and passed between a series of calender-rolls which impart the desired degree of finish to the surface thereof, after which the web is wound up on a take-up roll. .lt is desirable that the calendenrolls shall be normally dimren at rel: "ively high speeds but that they shall nevertheless, be capable of runnine at relatively low speeds, from time to time. to facilitate the threading operation,- that is, the manual passing or"? the broken ends of the paper web between the calenderrolls whenever, for any reason the continuity of the web coming; from the supply roll is interrupted.

The principal objects of the present inve'l'ition are to provide in a calendering-machine, an, eiiicient and reliable drl capable of being adjusted at wi l to drive me caleiuler-rolls either at relatively low speeds, to facilitate the threading; of the paper web thorethrougln or relatively high speeds, durino normal operating conditions; to provide driving mechanism of this kind adapted to operate with a maximun. degree of etlicienl0 c v without particular accuracy in the initial.

Serial No. 483,?42.

The invention will be readily understood by reference to the accompanying drawings illustrating the preferred embodiment thereof, and the following description of the c0nstruction therein shown.

in the drawings;-

Fig. 1 is a view in side elevation, of a portion of a calendering-machine, showing particularly a driving; mechanism therefor constructed in accordance with the present invention; and

Fig. 2 is a top plan view of the driving mechanism shown in Fig. 1.

Referring to l; the ca-lendering-rnachine is provided with the usual supply roll take 1p roll. 6, these rolls being journaled in hearings in suitable standards 8 rising from the floor. The web of paper to be operated upon, which is indicated at 10, leads from a supply roll 4 and passes nd fro in the usual manner between a of calender-rolls l2 which as shown, are arranged in a vertical stack and are journaled in suitable bearings in the frame 1% of the ca endering-machine. The several calender nag rolls 12 are driven one from the other in the usual manner and the lowermost roll is from the driving means new to be described.

The d o; means comprisinga main or primary driving; mechanism for driving the machine at relatively high speed unoer noroperating conditions. and an auxiliary di vine; mechanisimcoacting with the main dri in .iechanism for driving the machine the threading operation. The main driving: mechanism normally receives its power from a primary motor 18. The auxiliary driving; mechanism,in turn,receives its power from an auxiliary or threading motor 20., the latter being' considerably smaller e and less powerful than the main mo to The two otors l8 and 20 are arranged s de or side with their armature shaf's parlto each other and to the calender-rolls h'ese 'motors may be mounted indepe flentlv of each other and as showin they secured'directly'to cross-beams 22 and lich are, in turn; secured to the floor 4 and w one side of frame 14.

' Themain or primary motor 18 is connectto drive the calender rolls throne h transmission devices of the so-called link-belt or silent chain type. To t his end, a sprocket-wheel which passes over said sprocket-wheel and over a similar spi'ocket'wlieel ofgreater diameter which is rigidly secured to the shaft of the lowermost calender-roll 12 The size of the motors 18 and 20 and thevdiame ters of the sprocket-wheels 28 and 32 are such as to give the required rate of rotation to the calender-rolls under normal operating; conditions.

The take-up roll 6 is'also adapted tobe driven from the main motor 18 through silent chain type transmission devices similar to thosealready described. These devices compriseya sprocket ivhcel 34E, rigidly secured to the armatureeshatt' 26, alongside or the sprocket-wheel 28, a sprocket-wheel 36 mounted upon the shaft of the takc-up roll and a linlebelt or silent chain 38 which passes over said sprocket-W11eels. To insure the maintenance of a constant surface speed of the roll of paper Web as the latter winds up on the take-up roll (5 the sprooket wheel 36 is provided with a: hub ll) which is trictionally connected with the: shaft of the takeup roll. Any suitable means may be employed tor thus frictiona-l'ly connecting the sprocket-wheel 36 with the shaft of the take- I up roll whereby the former will be permitted to slip upon the latter as the roll of paper being; wound thereon increases in diameter.

"he secondary motor 20- is' adapted'to be operated when the primary motor is inactive, to drive the armature-shaft of said primary motor at relatively low speedand thus'to effect the required low speed drive of the calender-rolls for the purpose of facilitating the threading" therebet-ween of the paper web. The secondary motor 20 is connected with the armature-shaft 26 of-the primary motor 18 by means of the silent chain-type of transmission in the following manner: As best shown in Fig. 2, a small sprocketwheel .12 is secured to the armature-shaft of the motor 20 and a sprocket-wheel 44 of ater diameter, is mounted upon the armature-shatt- 26 of the primary motor; The

two spr. (diet-wheels 4:2 and il are connected by means of a link-belt or silent chain 46.

la order that the parts of the driving 'l (\jfl. k!l'llfiii' shall be assembled in compact coin is; for the purpose "of econorn riing i be noted that the I iged on the same-side of selected therewith as the-primary t is pointed out that the arrangeiiit of the two motors in the particular nner shown would be impracticable if, or example spin-gears weref'relied upon to transmit the power of the secondary m0- tor, unless one ormore idler-gears-were erriployed, in which event an added amount of frictional resistance would be involved in the transmission. i

The sprocket-wheel 4 1- is adapted to be connected with the armature-shaft 26 by means of an overthrow clutch. 48. The clutch 48 may be a ratchet clutch of any suitable constructiom whereby the sprocketwheel ltw'ill be operatively connected with the armature-shaft 26 during such time as aid sprocket-wheel is being driven by the secondary motor and whereby, when the primary motor '18 has been put in operation and drives its armature-shaft at a speed greater-than that at which it has been driven by the secondary motor 20, the overthrow clutch 48 will become operative to disconnect the sprocket-wheel l i and the armatureshaft 26. Suitable manually-controlled rheostats(-not shown) may be employed for starting and stopping the motors 18 and 20.

In operation, Whenever it 'is necessary to thread the paper web through the stack of calender rolls, the machine is driven from the threading motor 20. Through the agency of the chain 46 and the ratchetclutch 48 the motor 20 operates to drive the armature-shaft 26 of the motor 18 at slow speed. and the rotation of said shaft is transmitted through the chains and 38 to the calender-1i"olls 12 andthe take-up roll 6, respectively. Afterthe threading operation has been accomplished, the circuit controller (not shown) isoperated to cut in the circuit for motor 18, and simultaneously cut out the circuit for the motor 20. Motor 18 willthen pick up the load and when the speed of connect said shaft from the sprocket-wheel 41 i and thereafter said shaft is driven by the motor 18 at high speed, and accordingly the calender-rolls and the take-up roll are also driven at high speed.

A driving mechanism constructed and arranged in accordance with the present in vention may be installed at a considerably less expanse than that necessary for the installation of other tvpes of driving mechanism; This advanta e is largely due to the 'emplo uncnt ot alinl -belt or silent chain for transmitting: the power from the motors. 1e saviuqin the costot installation of the sent 6 iving; mocha ism is made partila ly ap re t by comparison with the J ense O; allation of other forms of hill 1W l'l'lGCllilllLllL such for example, as one in which the transmission of power is eii'ected throi :h the medium of iritermeshiu spur-gear I a spur g ar transmission ould be employed, the exercise of extreme care in mountains; the motors would be necessary .lHOl'TlG!" that the gears shall be properly alined and otherwise adjusted to properly, intermesh and thus insure a maximum degree ot'eliiciei'mv in operation. ln pram ticcr wherever a spur-gear transmission is employed in iililiVl ilLlil-l electric driving mechanisms of this-general character, it is found neces sary, on account of the weight of the motors, to mount them upon solid concrcte foundations in order that the proper relative adjustment of the interineshing gears shall he maintained. No such ZIHlOLh t of labor or enpense is involved in the mounting of the motors of the present driving mechanism since the transmission of power is effected by. means of linkbelts or silent chains. Such chains or belts, by reason of their flexibility, will enable the driving mechanism to operate without loss elliriency, although the sprocltetwheels over which the chains pass may have been more or less inaccurately alined when the driving mechanism was installed or may subsequently become displaced from their adjusted positions. Furthermore the various parts are of simple and rugged construction and they are compactly arranged in such a man ner as to occupy a minimum amount of floor space. As clearly illustrated. in Fig. 2, the economy of floor space largely the result of the arrangement oi? the secondary motor on the same side of the chain driven thereby as the primary motor this arrangement being remlered practicable by the use oil the silent chain type o'l' trmismission herein described.

Having thus described the invention, what is claimed as new is l. A. calendering-machine havi bination, a series of calender ro driving mechanism for driving; the calenceirolls at relatively high speed during n operation conditions comprising: a motor and transmission devices of the si ent chain type between said motor and one oi? said rolls, and an auxiliary driving H'Etf'lb anisn'i for coasting with said main driving; mechanism when the motor thereof is inactive for driving the machine at relatively slow speed, said mechanism comprising a secondary motor and transmission devices of the silent chain type between the secondary motor and the armature-shaft oi the first motor.

5 A. cslendering-niachil binatioin series of ca en roll, a niain driving me the calender rolls at 1 rely l during normal operating condit prising main motor and tra vices of the silent chain ty 'ie :l motor and one oi said rolls, transmission devices of the silent chain typo l'vetwocn sr' d motor and the tahe-up roll, and a; iliary driving mechanism for coasting M said main drlvl mechanism when the motor hereof is ina tive for driving the machine at relatively slow speed said mechanism corn and transinivt-don between the true-,shatt oi hemon L7 rolls and a sing; over said imli sry "mechanism motor inactive for it to drive the low speed. said condary mmhor a armature-shaft rocket-wheel on primary motor, e passing over et-wneels. -e having; in coml der rolls; main i tor drr the rolls at a speed under normal operatw y motor.

heels,

A, t-whcc ;er rolls and a over said .i ary I nechanisin is i ve the caliy low speed, said in coin ising secondary motor w et-wheel on the armature-shaft or, a fourth sprocket-wheel on i 7 third and fourth sprocket rhitcl: constructed and arrang ed to connect 'rth in)rocket-wheel n its shaft said shaft 592 being; driven by the sec-- motor and to automatically disc/om ncct said shaft from said fourth spr0cketwheel when driven a greater speed by the nary motor. (ZllQililQv l g l '1 speed durii a air n dri nature-shz-iiit '1' ml opera snroche end erine; mach ine onnectinn; one of eels with the take-up roll, type connecting c i I wh carried by the 'i toe J the other of said pair of sprocketwvheeis With the sprocket-Wheel carried by the ca1- ender roii, a driven sprocket-Wheel on said arrnattire-shaft at the opposite end thereof from said pair of sproeket-Whee1s, a secondary motor-having a sprocket-Wheel on its ari'nature-shaft, a third chain of the silent type connecting the last-mentioned sprocketwheel with said driven sprocket-Wheel for driving the arnature-shaft of the primary motor at relatively slow speed When said motor is inactive, the secondary motor being arranged at the same side of said third chain as the primary motor, and a clutch G011-, structed and arranged to connect said driven 15 sprocket-Wheel With the armature-shaft of the primary motor While said shaft is being driven. by the secondary motor and to autoniatically disconnect said shaft from said driven sprocket-wheel when said shaft v is driven at accelerated speed by the primary motor.

In testimony whereof I have affixed my signature. Y

JEREMIAH H. wnirnnonsn. 

